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a power supply that provides a voltage of 300vmiddotsin317middott where t is in seconds is connectedacross a resistor r
a mixture of the compounds sodium bromide and calcium oxide contains 234 g of calcium oxide and is 691 by mass calcium
a 70 kg box is raised from rest adistance of 10 m by a vertical forceof 120 na find the work done by the forcejb find
the drawing shows a point charge q 058microc and two locations a and b what is the electric potential differencevb -
describe how you would prepare 1000 l of 005m hepes buffer ph 745 in the lab you have pure hepes a ph meter 100 m hcl
the displacement vector for a 150 second interval of a jetairplanes flight is 215e3 -2430 ma what is the magnitude of
calculate the equilibrium constant for the weak base ch3nh2 if a solution of the base with an initial concentration of
when 150 ml of 0400 m h are mixed with 200 ml of 0500 m oh- the final temperature of the solution is 265degc what was
household bleach is an aqueous solution of sodium hypochlorite what is the molarity of a bleach solution that contains
a 16lb wooden crate sits on a wooden board inclined at 20degreesa whats the normal forceb what is the static friction
energy stored in electric and magnetic fields a magnetic field has a magnitude of 10 t what is the magnitude of an
a bullet of mass m is fired with speed vo toward a steel block of mass m which is hanging from a massless rod of length
the measured dipole for a binary molecule is 053 d with a bond length of 219 pm what is the separated charge in
at a temperature of 250k the molecules of an unknown gas z have an average velocity equal to that of hi at 500k what is
a 1790 g sample of a solution of the solute methanol in the solvent ethanol that has a concentration of 450 by mass
a long ladder rests on the ground and against a frictionless roller at the top of a wall of height h120m the mass of
a particular inductor has appreciable resistance when the inductoris connected to a 115 v battery the current in the
an airplane sends out a radar pulse of frequency45x1010hz the signal returns to the plane 06 ms later what is the
in a common but dangerous prank a chair is pulled away as a personis moving downward to sit on it causing the victim to
in a series rlc circuit the resistance is 46 the capacitance is32 muf and the inductance is 43 mh the ac generator
the blades in a blender rotate at a rate of6600 rpm when the motor is turned off during operation theblades slow to
a body passes a certain point a of the straight line on which it is moving with uniform accelaration one second
to start a lawn mower you must pull on a rope wound around theperimeter of a flywheel after you pull the rope for 087 s
the electric field e fq is analagous to the gravitationalfield g fm they both describe a vector fielda describe what
a 160-kilogram astronaut including lifesupport lands on the asteroid eros where the gravitationalacceleration g is